Q5/X451 FATC DTC Troubleshooting Data Version: 1.0 Date: 16-Oct-2018 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. Author: ERC Page: 104 of 202 B1F4A-23:- AC Request Button-Signal Stuck Low Overview:- ISO Code B1F4A – 23 Customer Symptom AC request cannot be manually selected Fault Effects (On Vehicle) The AC switch is stuck and AC is deactivated also AC LED status is not changing Lamp Status (If Any) No Limphome Fault Detection Condition AC Request Button-Signal Stuck Low Normal Operating Condition To make AC ON/OFF Probable Trouble Area Mode switch component failure. Healing Condition Check and lubricate switch, replace control panel Component Details: AC switch Button is shown in above image. This button used to change the AC position from ON to OFF or Vice versa. Preliminary Checks: Switch On the IGN & perform the following check. 1) Connect the Diagnostics tool & check the DTC fault code 2) If the fault code exists, refer the corrective actions
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